2 Simple CSS Questions

Hiya, try these, adjusting colour and spacing as desired:

I’d like to add a horizontal borders between the posts (shown as excerpts) on the main screen

.home footer {
   border-bottom: 1px solid #999;
   padding-bottom: 15px;
}

I’d like to put padding on top of the previous/next links on single posts

#nav-single {
   margin-top: 20px;
}